74HCT245D

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74HCT245D

IC TXRX NON-INVERT 5.5V 20SOIC

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規格

Package Tape & Reel (TR),Cut Tape (CT)
Series 74HCT
ProductStatus Active
LogicType Transceiver, Non-Inverting
NumberofElements 1
NumberofBitsperElement 8
OutputType 3-State
Current-OutputHighLow 6mA, 6mA
Voltage-Supply 4.5V ~ 5.5V
OperatingTemperature -40°C ~ 125°C (TA)
MountingType Surface Mount
Package/Case 20-SOIC (0.295, 7.50mm Width)

概述

Description

The 74HCT245D is an octal buffer/driver designed for data transmission in digital circuits. It features eight channels that can either transmit or receive data, making it ideal for interfacing between different logic levels or for driving multiple loads. This device operates under TTL (Transistor-Transistor Logic) voltage levels, offering high-speed performance and low power consumption.
Key features include:
- Bus Transceiver: It can be configured to transmit or receive data, enhancing flexibility in design.
- High Drive Capability: It can drive capacitive loads, making it suitable for bus lines.
- Tri-State Outputs: The outputs can be placed in a high-impedance state, allowing multiple devices to share the same bus without interference.
- Wide Supply Voltage Range: It typically works within a range of 4.5V to 5.5V, compatible with various digital systems.
Common applications include signal buffering, interfacing between 5V and lower voltage systems, and digital communication lines where data integrity is crucial.

Features

The 74HCT245D is an octal buffer/driver with three-state outputs, designed for high-speed data transmission. Key features include:
1. Data Direction Control: It has an output enable (OE) pin that allows easy control of the tri-state outputs.
2. Voltage Compatibility: Operates with a VCC range of 4.5V to 5.5V, compatible with TTL logic levels.
3. High Drive Capability: Each output can drive up to 15mA, suitable for various applications.
4. Fast Switching Times: Offers low propagation delays (around 5ns at VCC = 5V), making it suitable for high-speed applications.
5. Wide Supply Voltage: It can accommodate various supply voltages while maintaining logic compatibility.
6. Pin Configuration: Available in a 20-pin DIP package, it facilitates easy integration into various circuit designs.
7. Noise Immunity: Provides improved noise margins compared to standard TTL devices.
These features make the 74HCT245D ideal for data bus applications, interfacing between TTL and CMOS devices, and buffering data lines in digital circuits.

Package

The 74HCT245D is typically available in a DIP (Dual In-line Package) form factor, specifically a 20-pin DIP. It may also be found in other packages such as TSSOP and SOIC, depending on the manufacturer. The DIP package facilitates easy integration into breadboards and PCBs.

Pinout

The 74HCT245D is an octal buffer/driver with 3-state outputs. It consists of 20 pins. Here’s a brief description of the pin functions:
1. Pins 1-8 (A1-A8): These are the data input pins.
2. Pins 19-12 (Y1-Y8): These are the data output pins, providing buffered versions of the inputs.
3. Pin 9 (GND): Ground pin, connected to the circuit ground.
4. Pin 10 (OE): Output Enable pin. When LOW, the outputs are active; when HIGH, the outputs are in high-impedance (3-state).
5. Pin 11 (DIR): Direction control pin. It determines whether data flows from inputs (A) to outputs (Y) or vice versa.
6. Pin 18 (VCC): Supply voltage pin, typically connected to +5V.
7. Pin 17 (A0): Additional data input pin for expansion or cascading.
The 74HCT245D is commonly used in applications requiring data buffering, signal conditioning, or level shifting in digital circuits.

Manufacturer

The manufacturer of the 74HCT245D is Texas Instruments (TI), a well-known American technology company. Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, including digital signal processors, microcontrollers, and analog devices. Established in 1930, the company has a strong presence in both consumer electronics and industrial markets, providing solutions for applications in automotive, communication, and computing industries. TI is recognized for its innovation in analog technology and embedded processing, making it a significant player in the global semiconductor market. The 74HCT245D is a high-speed CMOS octal buffer/driver with 3-state outputs, commonly used in digital circuits for data management and signal buffering.

Application

The 74HCT245D is an octal buffer/driver with tri-state outputs, commonly used in digital circuits for data transmission. Its primary application areas include bus communication, data line buffering, signal isolation, and interfacing between different voltage levels. It is frequently utilized in microcontroller and microprocessor systems, memory interfacing, and peripheral device connectivity, making it essential in various electronic devices such as computers, industrial automation, and consumer electronics.

Equivalent

Equivalent products to the 74HCT245D chip include the 74HC245, 74LS245, and 74VHCT245. These chips also function as octal transceivers with similar voltage levels and logic functions, but may differ in speed, power consumption, or input/output characteristics. Always check specific datasheets for precise compatibility.

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